Trove is GPL (last I looked). Mahout has primitive collection implementations (and is obviously ASL).
There are other implementations such as hppc (see http://labs.carrotsearch.com/hppc.html ) Mahout is a decent implementation, but I think that hppc has had a round or two more optimization. And 150,000 entires in a table is not big for this sort of situation. Anything short of Integer.MAX_VALUE/small_factor should be fine. On Tue, Nov 5, 2013 at 5:49 PM, Bruno P. Kinoshita < brunodepau...@yahoo.com.br> wrote: > Maybe Trove's TObjectMapLong? > > [1] > http://trove4j.sourceforge.net/javadocs/gnu/trove/map/TObjectLongMap.html > > > HTH, > > Bruno P. Kinoshita > http://kinoshita.eti.br > http://tupilabs.com > > > >________________________________ > > From: Gary Gregory <garydgreg...@gmail.com> > >To: Commons Developers List <dev@commons.apache.org> > >Sent: Tuesday, November 5, 2013 11:39 PM > >Subject: I need a map for long and double > > > > > >Hi All: > > > >I'm looking for a Map implementation that takes a String as a key and a > >long as the value (and another taking a double as the value). I'd rather > >not take the extra memory of using generic map with a Long object value > hit > >since the maps will have up to 150,000 entries. That would save me... a > meg > >for each map I am guestimating (on a 64-bit JVM). A meg here, a meg > there... > > > >I did not see anything in [collections] or Google Guava. > > > >Thoughts? > > > >Gary > > > >-- > >E-Mail: garydgreg...@gmail.com | ggreg...@apache.org > >Java Persistence with Hibernate, Second Edition< > http://www.manning.com/bauer3/> > >JUnit in Action, Second Edition <http://www.manning.com/tahchiev/> > >Spring Batch in Action <http://www.manning.com/templier/> > >Blog: http://garygregory.wordpress.com > >Home: http://garygregory.com/ > >Tweet! http://twitter.com/GaryGregory > > > > > > >
